Rock-drilling machine



(No Model.) 2 Sheets-Sheet 1.

S. W. KIMBLE.

ROCK DRILLING MACHINE. No. 302,342. Patented JulyQ-Z, 1884.

MI I 1 I nu J "I! rill/I I W (No Model.) 2 Sheets-Sheet 2.

S. W. KIMBLE.

300 DRILLING MACHINE.

No. 302,342. Patented July 22, 1884.

nummmuumulmm LIZ 76 9.6,

- [Il 141E711 NITED STATES PATENT OFFICE.

sMITH w. KIMBLE, or nnnvnn, COLORADO.

ROCK-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 302,342, dated July 22, 1884.

(No model.)

To aZZ whom it may concern:

Be it known that 1, SMITH W. KIMBLE, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Hand Rock-Drilling Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to hand rock-drilling machines, and is especially adapted to mining, such as tunneling, sinking shafts, and any and all kinds of rock-work.

Figure 1 is a side elevation. Fig. 2 is a plan or top view. Figs. 3 and 4 are sections through 00 m, Fig. 1. Figs. 5, 6, 7, 8, and 9 are details of thesaid machine.

Similar letters of reference indicate like parts in all the figures where they occur.

A is the frame, to which guide-rods B B are fastened, supporting a movable frame or ,car-

riage, 0, containing the drill-shank D. The

said movable frame 0 also carries the hammer E and arm F, as well as aspring, G, and levers H H, connected by links I I to the lever-arms J, operated by the hand-lever K. The hammer is thrown forward by the spring. By the movement of the lever K through a segment of a circle, as shown in dotted lines in Fig. 1, an oscillating movement is produced on the lever-arm J and transmitted through the arms I I to the levers H H, producing an alternate movement of the levers H H back and forth, producing a stroke of the hammer E at each upward motion, and also at each downward motion of the lever K. The levers H H are made with a knuckle-joint turning on the center ii, that yields in passing back under the lug or half-round pin L in the hammer-helve R. The hammerhelve Bis hinged at M, and the levers H at N, on an eccentric pin and lever, 0. By turning these to a certain position the levers H H may be lowered, permitting the hammer to strike a light blow, owing to their shortening, and leaving thehalf-round pin L before the spring G has been compressed to its full strength. By changing the position of the eecentric by turning the small lever O the levers H H may be raised, so as to retain their hold on the pin L until a later period. By thus operating the spring will be more compressed at each backward movement of the hammer, and the hammer will have a longer range of motion in which to accumulate velocity, so that a strong blow will be struck.- This gives the operator full control over the force of the blows.

There is in the lever K a joint formed by two flat disks, either smooth or radially grooved, which may be matched together in any position required, and held by a central bolt, is. In shifting the drill into various positions to drill holes in various directions and at various heights, the handle may not come in a convenient position for working. \Vhen this occurs, the operator slackens the nut on the bolt, turns the lever loosely around, not on its center, but on the bolt as a center, and then tightens the nut on the bolt is again, so as to make the joint again rigid. This, in fact, bends the lever K into a new position in which the operator may give it the required range of vibration with greater ease. brating it to a certain extent in any position will be the same. It will always rock the two arms J J, so as to work the two links I I with their connectionsintermittently, and cause the hammer to make the required two motions at each complete vibration of the lever K. In starting the hole, light blows are in order. After the hole is well started, stronger ones are required. As the drill carried in the drill shank D deepens the hole in the rock, the carriage 0 moves forward on its guideways or guide-rods B. \Vhen this has progressed to a sufficient extent, the operation is stopped, and the carriage C and its attachments are drawn backward. Then the weight T is detached, there is nothing to prevent moving the carriage O freely backward until it leaves the guides B and is entirely free. Then the drill may be taken out of the drill-stock D, alonger one inserted, and the parts returned to their places and the work resumed. This may be repeated as often as desired.

The turning movement of the drill is effected by the double ratchet l? and the pawl Q, piv- The effect of vi- I oted to the hammer-helve R at q. \Vhen the hammer E is drawn back, the arm Q rotates the drill one notch of the ratchet P, throwing the drill from the rock at the instant of the partial turning of the drill-shank D, and again throwing it to the rock by means of the spring S, the frame 0 following up, as the drill advances in the rock, by the weight T and cord 2, as shown in Fig. 1.

The disk-cheek U on the side of the frame is for supporting the machine when used on a vertical column, and is fastened to a diskclamp, V. It will be seen that the machine will swivel at any angle on a horizontal, vertical, or variously-inclined column,Y, to allow assuming any position that may be required, with the simple changing of the disk-clamp V from the bottom to either side, slackening the bolt w of the spring-clamp \V, shifting the machine into the desired position 011 the column Y, and again tightening the bolt 20. It can also be moved vertically or horizontally along the column Y, and held in position by means of the said clamp, giving the operator the advantage of working the machine to the highest point in a tunnel with the lever K thrown downward, as shown in Fig. l in dotted lines, as also swiveling the machine upside down by means of the disks, making it convenient to drill at the bottom of the tunnel with the lever K standing upright in the most favorable position for theoperator to work the machine. The position of the lever K is changed at will by the clamp K. Theliberation of the hammer while the hand-lever K continues to be held in the hand, and perhaps to continue its motion, results from the difference of the positions of the center M of the hammer-helve R, and of the center N of the two levers H. The hinged end or point of each lever H engages strongly with R at the commencement of its movement to draw back riod is varied by changing the position of the small lever O, and consequently bringing the centers of motion of the levers H nearer to or farther from the center M. By employing two of these levers H, arranged to act alternately, one of the pawls is always back, ready to commence to act at the moment the other has done its work. I

4 Modifications may be made in the forms and proportions within wide limits. Parts of the invention may be used without the whole. I can operate successfully without the weight T and its attached cord, the operator simply pressing the machine gently forward toward its work as he rocks the lever K. It is preferable to work in that manner under most circumstances.

I claim as my invention 1. In a rock-drill, the carriage O and guideways 13, supporting the same, the hammer and hammerhelve borne on the center M, and having a lug, L, together with its operatingspring, in combination with the operating-lever H, turning on a center, N, as shown, out of coincidence with the center M, and with means for strongly vibrating such lever, as herein specified.

2. The duplicate levers H, turning on the adjustable center N, as shown, the duplicate links I, connected to the same and to the arms J, operated by the single lever K, in combination with each other and with the hammer E, operating-spring G, and helve R, having lug L, and turning on a different center, M, whereby the force of the blow may be varied at will, as specified.

3. In a rock-drill having a hammer, E, and

helve It, borne on axis M, duplicate levers H H and I I, engaging said helve with arms J of the operating-lever K, said lever having an adjustable joint, 7c, capable of being set at various angles, all in combination substantially as herein specified.

In testimony whereof I have hereunto set my hand, at New York city, this 14th day of May, 1883, in the presence of two subscribing witnesses.

' S. V. KIMBLE.

Witnesses:

M. F. BOYLE, H. A. JoHNsToNE. 

